參數(shù)資料
型號： CYM1838
廠商： Cypress Semiconductor Corp.
英文描述： 128K x 32 Static RAM Module(128K x 32 靜態(tài)RAM模塊)
中文描述： 128K的× 32靜態(tài)RAM模塊（128K的× 32靜態(tài)內(nèi)存模塊）
文件頁數(shù)： 2/6頁
文件大小： 244K
代理商： CYM1838
CYM1838
PRELIMINARY
2
Maximum Ratings
(Above which the useful life may be impaired.)
Storage Temperature .................................–65
°
C to +150
°
C
Supply Voltage to Ground Potential............... –0.5V to +7.0V
DC Voltage Applied to Outputs
in High Z State............................................... –0.5V to +7.0V
DC Input Voltage ............................................–0.5V to +7.0V
Operating Range
Range
Ambient
Temperature
0
°
C to +70
°
C
–55
°
C to +125
°
C
V
CC
Commercial
Military
5V
±
10%
5V
±
10%
Electrical Characteristics
Over the Operating Range
1838
Parameter
V
OH
V
OL
V
IH
V
IL
I
IX
I
OZ
I
CCx32
Description
Test Conditions
Min.
2.4
Max.
Unit
V
V
V
V
μ
A
μ
A
mA
Output HIGH Voltage
Output LOW Voltage
Input HIGH Voltage
Input LOW Voltage
Input Load Current
Output Leakage Current
V
CC
Operating Supply Current
by 32 Mode
V
CC
Operating Supply Current
by 16 Mode
V
CC
Operating Supply Current
by 8 Mode
Automatic CS Power-Down
Current
[1]
Automatic CS Power-Down
Current
[1]
V
CC
= Min., I
OH
=
4.0 mA
V
CC
= Min., I
OL
= 8.0 mA
0.4
6.0
0.8
+20
+10
720
2.2
–0.3
–20
–10
GND < V
I
< V
CC
, V
CC
= Max.
GND < V
O
< V
CC
, Output Disabled
V
CC
= Max., I
OUT
= 0 mA, CS < V
IL
I
CCx16
V
CC
= Max., I
OUT
= 0 mA, CS < V
IL
480
mA
I
CCx8
V
CC
= Max., I
OUT
= 0 mA, CS < V
IL
360
mA
I
SB1
Max. V
CC
; CS > V
IH
, Min. Duty Cycle = 100%
240
mA
I
SB2
Max. V
CC
; CS > V
CC
0.2V,
V
IN
> V
CC
0.2V or V
IN
< 0.2V
40
mA
Capacitance
[2]
Parameter
Description
Test Conditions
T
A
= 25
°
C, f = 1 MHz,
V
CC
= 5.0V
Max.
50
50
Unit
pF
pF
C
IN
C
OUT
Notes:
1.
2.
Input Capacitance
Output Capacitance
A pull-up resistor to V
on the CS input is required to keep the device deselected during V
CC
power-up, otherwise I
SB
will exceed values given.
Tested on a sample basis.
AC Test Loads and Waveforms
1838–3
1838–4
90%
10%
3.0V
GND
90%
10%
ALL INPUT PULSES
5V
OUTPUT
30 pF
INCLUDING
JIG AND
SCOPE
5V
OUTPUT
5 pF
INCLUDING
JIG AND
SCOPE
(a)
(b)
< 5 ns
< 5 ns
OUTPUT
R1 481
R1 481
R2
255
R2
255
167
Equivalent to:
THEVENIN EQUIVALENT
1.73V
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